FIELD: hydraulic structure building, particularly to recover water-tightness of hydraulic structure composed of low-temperature ground and rock, especially in permafrost areas, to repair watertight diaphragm of ground dam built in permafrost area.
SUBSTANCE: composition contains polyvinyl alcohol taken in amount of 3-10% by weight, boric acid taken in amount of 0.2-1.0% by weight, remainder is water.
EFFECT: increased efficiency and structural stability of the composition during freezing and thawing thereof.
1 ex, 2 tbl, 3 dwg
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